Multi-channel optical fiber refractometer based on tree topology structure

Niu Panpan; Zhao Junfa; Zhang Cheng; Bai Hua; Shi Weiguang

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Multi-channel optical fiber refractometer based on tree topology structure

机译：基于树拓扑结构的多通道光纤折射仪

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A multi-channel optical fiber refractometer based on S fiber taper (SFT) cascaded with fiber Bragg grating (FBG) is proposed and experimentally demonstrated. The compact SFT acts as an in-line Mach -Zehnder interferometer (MZI) to be used as a band-pass filter (BPF) to tailor the FBG reflection, whose transmission spectrum is sensitive to the surrounding refractive index (SRI). Thus, the peak power of the FBG reflection is modulated by the SRI. The three-channel SRI monitor can be achieved by discriminating the different center wavelength and peak power variation of the FBG reflections. Experimental results show that the RI sensitivities of Channels 1, 2, and 3 are 345.54, 349.57, and 463.60 dB/RIU, respectively. Moreover, the temperature cross-sensitivity can be solved by interrogating the center wavelength of the FBG reflection. (C) 2018 Optical Society of America

机译：提出了一种基于S纤维锥度（SFT）的多通道光纤折射仪，并在实验上证明了纤维布拉格光栅（FBG）。紧凑的SFT用作线上机Machnder干涉仪（MZI）用作带通滤波器（BPF），以定制FBG反射，其透射光谱对周围的折射率（SRI）敏感。因此，通过SRI调制FBG反射的峰值功率。通过区分FBG反射的不同中心波长和峰值功率变化，可以实现三通道SRI监视器。实验结果表明，通道1,2和3的RI敏感性分别为345.54,349.57和463.60dB / RIU。此外，通过询问FBG反射的中心波长，可以解决温度交叉灵敏度。（c）2018年光学学会

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来源
《Applied optics》 |2018年第16期|共5页
作者
Niu Panpan; Zhao Junfa; Zhang Cheng; Bai Hua; Shi Weiguang;
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Tianjin Key Lab Optoelect Detect Technol &

Syst Tianjin 300387 Peoples R China;

Tianjin Key Lab Optoelect Detect Technol &

Syst Tianjin 300387 Peoples R China;

Tianjin Key Lab Optoelect Detect Technol &

Syst Tianjin 300387 Peoples R China;

Tianjin Key Lab Optoelect Detect Technol &

Syst Tianjin 300387 Peoples R China;

Tianjin Key Lab Optoelect Detect Technol &

Syst Tianjin 300387 Peoples R China;

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正文语种 eng
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Multi-channel optical fiber refractometer based on tree topology structure

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